How to use str_remove_all() In R Language

We need to first install the package “stringr” by using install.packages() command and then import it using library() function.

str_remove_all() function takes 2 arguments, first the entire string on which the removal operation is to be performed and the character whose all the occurrences are to be removed.

Syntax: str_remove_all(string, char_to_remove)

Parameter:

string: entire string

char_to_remove: character which is to be removed from the string

Example: R program to remove whitespaces using str_remove_all()

Output:

[1] “Welcometow3wiki”

Since we have understood the str_remove_all() function so let’s move on to the approach where we will be applying this function to all the rows of the Dataframe.

Syntax: as.data.frame(apply(df,margin, str_remove_all, ” “))

Parameters:

df: Dataframe object

margin: dimension on which operation is to be applied

str_remove_all: operation to be applied

In this approach, we have used apply() function to apply a function to each row in a data frame. The function used which is applied to each row in the dataframe is the str_remove_all() function. We have passed whitespace ” ” as an argument, this function removes all the occurrences of ” “, from each row. 

Note: We have wrapped our entire output in as.data.frame() function, it is because the apply() function returns a Matrix object so we need to convert it back into a dataframe.

Example: R program to remove whitespaces from dataframe using str_remove_all()

Output:

        c1    c2

1 geeksfor geeks

2       cs     f

3   r-lang     g

In this article, we will learn how to remove all whitespace in each dataframe column in R programming language.

Sample dataframe in use:

           c1     c2
1   geeks for geeks 
2          cs     f 
3  r   -lang       g